Furnace-door.



No. 755,007. PATENTED MAR. 22,1904 H. H. HUFP.

FURNAGE noon. APPLICATION IILED JULY 8, 1903.

I0 MODEL.

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Patented March 22, 1904.

HENRY H. HUFF, OF BOSTON,

LOOOMOTIVE APPLIANCE MASSACHUSETTS, ASSIGNOR TO HUFF COMPANY OF KITTE R Y, MAINE.

FURNACE-DOOR.

SPECIFICATION formingpart of Letters Patent No. 755,007,

dated March 22, 1904.

Application filed July 6, 1903. Serial No. 164,296. (No model.)

T0 or whom it may concern:

Be it known that I, HENRY H.HUFF, of Boston, in the county of Suifolk and State of Massachusetts, have invented certain new and useful Improvements in Furnace-Doors, of which the following is a specification.

This invention relates to doors for furnaces or fire-boxes, and may be embodied in a door for a fire-box of a locomotive or a door of a stationary fire-box.

The invention has for its object to provide a door which will permit the utilization of either the entire opening covered by the door or only a part of said opening, so that when the exigencies of service require but a small opening for the introduction of fuel or for other purposes a part of the door may be kept closed and when it is necessary to uncover the entire opening the whole door may be opened.

The invention consists in the several improvements which Iwill now proceed to describe and claim.

Of the accompanying drawings, forming a part of this application, Figure 1 represents a side view of a door embodying my invention. Fig. 2 represents a section on line 2 2 of Fig. 1. Fig. 3 represents an edge view of the door and its casing. Fig. t represents a section on line A at of Fig. 1. Fig. 5 represents a section on line 5 5 of Fig. 1.

The same letters of reference indicate the same parts in all of the figures.

In the drawings, (0 represents a fixed plate or casing in which the openingfor the admission of fuel to the furnace or fire-box is formed. The said opening is covered by a door which is divided horizontally into two sectionsb and c. Said sections are hinged independently to the casing a, each section having a vertical hinge member Z, the said hinge members Z being connected by a bolt or pintle m with fixed complemental hinge members (Z 61, formed on the casing 60. The sections Z) and c are therefore adapted to swing independently, so that one section may remain closed while the other is opened, or both sections may be swung together. Means are provided for detachably connecting the sections 6 and 0, said means as here shown comprising ears 0 6, formed on the upper section b, ears 0' 6', formed on the lower section 0 and coinciding with the ears 6 e, and coupling-bolts ff, adapted to be inserted in the orifices formed in the said ears to connect the ears and the sections on which they are formed. Means are provided for independently securing the swinging ends of the sections 6 c to the casing a. As here shown, the lower section 0 is provided with a latch h, which is pivoted at h to said lower section and is extended in opposite directions from the pivot, one of its ends being provided with a handle k and formed to engage a fixed ear or detent h to hold the door closed. The other end of the latch is provided with a shoulder if, which is adapted to engage a fixed detent 7L5, arranged on the casing 60 in position to hold the door open.

g represents a button pivoted to the casing a and arranged to engage the swinging end of the upper section b.

The lower edge of the upper section I; is offset, as indicated in Fig. 2, to form an opening between the adjacent edges of the two sections for the admission of air to the fire-box. The ofiset lower edge of the sectionb enables the said section to serve as a shield or hood to prevent the light from within the fire-box shining in the eyes of the firemen.

It will be seen from the foregoing that when ordinary firing is to be carried on the upper section b may remain closed, the bolts ff being withdrawn and the lower section 0 opene to permit the introduction of fuel. Under these conditions the upper section I) acts as a shield to protect the eyes of the firemen, as above stated, and also permits the constant inflow into the fire-box of a stream of air.

When it is desirable to uncover the entire opening in the casing a at each opening of the door, the button 9 may be swung out of place and the bolts ff inserted, so that the'sections b and 0 will move as a single door.

I claim 1. A furnace-door divided into two sections independently hinged, the adjacent edges of the two sections being formed to create an opening between the sections.

2. A furnace-door divided into two sections independently hinged, the lower portion of the upper section being offset outwardly to form a hood and create an opening between the two sections.

3. A furnace-door divided into two independently-hinged sections, means for inclependently securing the swinging ends of the sections, and means for detachably connecting the sections so that they may be operated IQ either singly or as one door.

4:. A furnace-door comprising two sections 

